From a 2000 EWD: AUTO DOWN OPERATION (FRONT PASSENGER’S WINDOW)
With the ignition SW on and with the auto SW of the power window master SW or power window control SW front RH in
DOWN position, current flowing to TERMINAL 7 of the power window control SW front RH to TERMINAL 6 to TERMINAL 1
of the power window motor front RH to TERMINAL 2 to TERMINAL 1 of the power window control SW front RH to
TERMINAL 12 to GROUND, causing the motor to rotate towards the down side. Then the solenoid in the power window
control SW front RH is activated and it locks the auto SW being pushed, causing the motor to continue to rotate in auto down
operation. When the window has completely descended, the current flow between TERMINAL 6 of the power window control
SW front RH and TERMINAL 12 increases. As a result, the solenoid stops operating, the auto SW turns off and flow from
TERMINAL 7 of the power window control SW front RH to TERMINAL 6 is cut off, stopping the motor so that auto stop
occurs.
The section I highlighted in bold leads me to believe that the auto up/down is internal to the switch. If you can find a switch without auto function to swap out then I would assume that would work, but my EWD only shows auto windows (no other window control options available) which leads me to believe that there isn't a manual switch. If you can find a spare window switch maybe you can try removing/disabling the solenoid that controls the auto function.